Thundurus-Therian (M) @ Electric Gem  
Ability: Volt Absorb  
EVs: 200 SpA / 76 SpD / 232 Spe  
Modest Nature  
IVs: 30 HP / 2 Atk / 30 Def / 30 SpA / 30 SpD  
- Thunderbolt  
- Volt Switch  
- Hidden Power [Flying]  
- Protect  

Conkeldurr @ Life Orb  
Ability: Iron Fist  
EVs: 140 HP / 252 Atk / 116 SpD  
Brave Nature  
IVs: 0 Spe  
- Hammer Arm  
- Ice Punch  
- Mach Punch  
- Helping Hand  

Shaymin-Sky @ Grass Gem  
Ability: Serene Grace  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Seed Flare  
- Air Slash  
- Tailwind  
- Protect  

Hydreigon @ Dark Gem  
Ability: Levitate  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Draco Meteor  
- Dark Pulse  
- Earth Power  
- Protect  

Heatran @ Shuca Berry  
Ability: Flash Fire  
EVs: 144 HP / 252 SpA / 16 SpD / 96 Spe  
Modest Nature  
IVs: 0 Atk  
- Flash Cannon  
- Heat Wave  
- Earth Power  
- Protect  

Gastrodon @ Sitrus Berry  
Ability: Storm Drain  
EVs: 176 HP / 124 Def / 40 SpA / 168 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Earth Power  
- Ice Beam  
- Recover  
- Protect